experience
learn from previous mistakes, experiences, patterns, … from myself or others; use them to create the future.
Never make the same mistake twice.
regret
there’s no benefit in being sad, angry, depressed, regretful, self-punishing, … about past mistakes. but what we can do (and it’s very important to do) is to constantly think about past mistakes but as a source of experience and for training our brain to make up for them by choosing better in future